Year Percent 2000-01-01 0.04326700000000000 2001-01-01 0.12856300000000000 2002-01-01 0.20184500000000000 2003-01-01 0.11818400000000000 2004-01-01 0.10504700000000000 2005-01-01 0.21441700000000000 2006-01-01 0.17623000000000000 2007-01-01 0.16463500000000000 2008-01-01 0.12410000000000000 2009-01-01 0.04068800000000000 2010-01-01 0.32815000000000000 2011-01-01 0.27570300000000003 2012-01-01 3.32069000000000040 2013-01-01 0.52580300000000000 2014-01-01 0.47262000000000000 2015-01-01 0.42475200000000000 2016-01-01 0.02323700000000000